When APIs are undocumented, teams waste time guessing.
  
  OpenAPI (Swagger) helps by describing:
  - endpoints
  - request bodies
  - response shapes
  - authentication methods
  
  ## Why it’s valuable
  
  - frontend devs can integrate faster
  - QA knows expected responses
  - fewer misunderstandings
  
  ## Practical tip
  Even if you do not implement Swagger UI yet, define a consistent JSON contract and document it in README.
  
  > Next: Deploy PHP professionally (Nginx/Apache, env vars, caching, and zero-downtime habits).

Learn why documenting APIs matters and how OpenAPI makes integration smooth for frontend teams.

API Documentation Basics (OpenAPI / Swagger Concept)

Learn PHP programming for server-side web development. Master PHP syntax, functions, and building dynamic websites.

API Documentation Basics (OpenAPI / Swagger Concept)

Why it’s valuable

Practical tip

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